Description

Acid Brown 266 is a synthetic organic dye belonging to the acid dye class, identified by CAS No. 61724-23-0. This high-performance colorant is valued for its strong affinity for protein fibers like wool, silk, and nylon, delivering excellent wash and light fastness properties. It is a critical component for manufacturers in the textile, leather, and paper industries seeking durable and vibrant brown shades. Our supply ensures consistent quality and reliable performance for industrial dyeing and printing processes.

Application

• Primary dyeing of wool, silk, and polyamide (nylon) fibers in the textile industry.
• Leather coloring for upholstery, footwear, and fashion accessories.
• Paper staining and surface coloring for specialty papers and packaging.
• Ink formulation for inks requiring good adhesion and color stability.
• Blending with other acid dyes to achieve a wide spectrum of brown and earth-tone hues.
• Used in research and development laboratories for colorant studies and material testing.

Basic Information

Product Name	Acid Brown 266
CAS No.	61724-23-0
Molecular Formula	Contact for details
Molecular Weight	Contact for details
Synonyms	Acid Brown 266; C.I. Acid Brown 266; 61724-23-0; Acid Leather Brown 266; Brown 266 (Acid Dye); Acid Dye Brown 266; Nylon Brown 266; Wool Brown 266
EINECS	Contact for details

Quality Control

Our Acid Brown 266 is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets precise color strength, shade, and purity specifications. A Certificate of Analysis (COA) detailing key parameters such as dye content, solubility, and fastness properties is provided with each shipment to guarantee batch-to-batch consistency and performance reliability for your applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed when not in use to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Brown Powder or Granules
Identification (IR)	Conforms to Standard
Assay (Dye Content)	≥ 95%
Moisture Content	≤ 5.0%
Water Solubility	Conforms
Shade	Conforms to Standard
Fastness Properties (Light, Wash)	Grade 4-5 (Typical)

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.